The cosmic horseshoe: discovery of an einstein ring around a giant luminous red galaxy

V. Belokurov; N. W. Evans; A. Moiseev; L. J. King; P. C. Hewett; M. Pettini; L. Wyrzykowski; R. G. Mcmahon; M. C. Smith; G. Gilmore; S. F. Sanchez; A. Udalski; S. Koposov; D. B. Zucker; C. J. Walcher

doi:10.1086/524948

The cosmic horseshoe: discovery of an einstein ring around a giant luminous red galaxy

V. Belokurov^*, N. W. Evans, A. Moiseev, L. J. King, P. C. Hewett, M. Pettini, L. Wyrzykowski, R. G. Mcmahon, M. C. Smith, G. Gilmore, S. F. Sanchez, A. Udalski, S. Koposov, D. B. Zucker, C. J. Walcher

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

94 Citations (Scopus)

Abstract

We report the discovery of an almost complete (̃300°) Einstein ring of diameter 10" in Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). Spectroscopic data from the 6 m telescope of the Special Astrophysical Observatory reveal that the deflecting galaxy has a line-of-sight velocity dispersion in excess of 400 km s^-1 and a redshift of 0.444, while the source is a star-forming galaxy with a redshift of 2.379. From its color, luminosity, and velocity dispersion, we argue that this is the most massive galaxy lens hitherto discovered.

Original language	English
Pages (from-to)	L9-L12
Number of pages	4
Journal	Astrophysical Journal
Volume	671
Issue number	1
DOIs	https://doi.org/10.1086/524948
Publication status	Published - 2007
Externally published	Yes

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Belokurov, V., Evans, N. W., Moiseev, A., King, L. J., Hewett, P. C., Pettini, M., Wyrzykowski, L., Mcmahon, R. G., Smith, M. C., Gilmore, G., Sanchez, S. F., Udalski, A., Koposov, S., Zucker, D. B., & Walcher, C. J. (2007). The cosmic horseshoe: discovery of an einstein ring around a giant luminous red galaxy. Astrophysical Journal, 671(1), L9-L12. https://doi.org/10.1086/524948

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abstract = "We report the discovery of an almost complete {\~(}300°) Einstein ring of diameter 10{"} in Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). Spectroscopic data from the 6 m telescope of the Special Astrophysical Observatory reveal that the deflecting galaxy has a line-of-sight velocity dispersion in excess of 400 km s-1 and a redshift of 0.444, while the source is a star-forming galaxy with a redshift of 2.379. From its color, luminosity, and velocity dispersion, we argue that this is the most massive galaxy lens hitherto discovered.",

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AU - Evans, N. W.

AU - Moiseev, A.

AU - King, L. J.

AU - Hewett, P. C.

AU - Pettini, M.

AU - Wyrzykowski, L.

AU - Mcmahon, R. G.

AU - Smith, M. C.

AU - Gilmore, G.

AU - Sanchez, S. F.

AU - Udalski, A.

AU - Koposov, S.

AU - Zucker, D. B.

AU - Walcher, C. J.

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The cosmic horseshoe: discovery of an einstein ring around a giant luminous red galaxy

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